- Add ACCESS_FINE_LOCATION permission (required for SSID on Android 10+)
- Request permission at runtime when detecting SSID
- Handle permission result and retry detection
- Add testConnection() method that only tests connectivity
- Connection test no longer syncs notes automatically
- Only 'Sync Now' button triggers actual synchronization
- Add toolbar setup in NoteEditorActivity
- Add toolbar setup in SettingsActivity
- Add toolbar to activity_settings.xml layout
- Fix back button and menu display issues